Class/Object

org.graphframes.lib

ConnectedComponents

Related Docs: object ConnectedComponents | package lib

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class ConnectedComponents extends Arguments with Logging

Connected components algorithm.

Computes the connected component membership of each vertex and returns a DataFrame of vertex information with each vertex assigned a component ID.

The resulting DataFrame contains all the vertex information and one additional column:

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  1. ConnectedComponents
  2. Logging
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  4. Logging
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Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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  1. final def !=(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  2. final def ##(): Int

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    AnyRef → Any
  3. def +(other: String): String

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    Implicit information
    This member is added by an implicit conversion from ConnectedComponents to any2stringadd[ConnectedComponents] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (ConnectedComponents, B)

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    Implicit information
    This member is added by an implicit conversion from ConnectedComponents to ArrowAssoc[ConnectedComponents] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. final def ==(arg0: Any): Boolean

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    AnyRef → Any
  6. final def asInstanceOf[T0]: T0

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    Any
  7. def clone(): AnyRef

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    protected[java.lang]
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    AnyRef
    Annotations
    @throws( ... )
  8. def ensuring(cond: (ConnectedComponents) ⇒ Boolean, msg: ⇒ Any): ConnectedComponents

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    Implicit information
    This member is added by an implicit conversion from ConnectedComponents to Ensuring[ConnectedComponents] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  9. def ensuring(cond: (ConnectedComponents) ⇒ Boolean): ConnectedComponents

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    Implicit information
    This member is added by an implicit conversion from ConnectedComponents to Ensuring[ConnectedComponents] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  10. def ensuring(cond: Boolean, msg: ⇒ Any): ConnectedComponents

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    Implicit information
    This member is added by an implicit conversion from ConnectedComponents to Ensuring[ConnectedComponents] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  11. def ensuring(cond: Boolean): ConnectedComponents

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    Implicit information
    This member is added by an implicit conversion from ConnectedComponents to Ensuring[ConnectedComponents] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  12. final def eq(arg0: AnyRef): Boolean

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    AnyRef
  13. def equals(arg0: Any): Boolean

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  14. def finalize(): Unit

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    protected[java.lang]
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    @throws( classOf[java.lang.Throwable] )
  15. def formatted(fmtstr: String): String

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    Implicit information
    This member is added by an implicit conversion from ConnectedComponents to StringFormat[ConnectedComponents] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  16. def getAlgorithm: String

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    Gets the connected component algorithm to use.

    Gets the connected component algorithm to use.

    See also

    org.graphframes.lib.ConnectedComponents.setAlgorithm.

  17. def getBroadcastThreshold: Int

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    Gets broadcast threshold in propagating component assignment.

    Gets broadcast threshold in propagating component assignment.

    See also

    org.graphframes.lib.ConnectedComponents.setBroadcastThreshold

  18. def getCheckpointInterval: Int

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    Gets checkpoint interval.

  19. final def getClass(): Class[_]

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  20. def hashCode(): Int

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  21. final def isInstanceOf[T0]: Boolean

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    Any
  22. def logDebug(s: String): Unit

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    protected
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    Logging
  23. def logInfo(s: String): Unit

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    protected
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    Logging
  24. def logTrace(s: String): Unit

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    Logging
  25. lazy val logger: Logger

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    LazyLogging → Logging
  26. final def ne(arg0: AnyRef): Boolean

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  27. final def notify(): Unit

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    AnyRef
  28. final def notifyAll(): Unit

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    AnyRef
  29. def run(): DataFrame

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    Runs the algorithm.

  30. def setAlgorithm(value: String): ConnectedComponents.this.type

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    Sets the connected components algorithm to use (default: "graphframes").

    Sets the connected components algorithm to use (default: "graphframes"). Supported algorithms are:

    • "graphframes": Uses alternating large star and small star iterations proposed in Connected Components in MapReduce and Beyond with skewed join optimization.
    • "graphx": Converts the graph to a GraphX graph and then uses the connected components implementation in GraphX.
    See also

    org.graphframes.lib.ConnectedComponents.supportedAlgorithms

  31. def setBroadcastThreshold(value: Int): ConnectedComponents.this.type

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    Sets broadcast threshold in propagating component assignments (default: 1000000).

    Sets broadcast threshold in propagating component assignments (default: 1000000). If a node degree is greater than this threshold at some iteration, its component assignment will be collected and then broadcasted back to propagate the assignment to its neighbors. Otherwise, the assignment propagation is done by a normal Spark join. This parameter is only used when the algorithm is set to "graphframes".

  32. def setCheckpointInterval(value: Int): ConnectedComponents.this.type

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    Sets checkpoint interval in terms of number of iterations (default: 2).

    Sets checkpoint interval in terms of number of iterations (default: 2). Checkpointing regularly helps recover from failures, clean shuffle files, shorten the lineage of the computation graph, and reduce the complexity of plan optimization. As of Spark 2.0, the complexity of plan optimization would grow exponentially without checkpointing. Hence disabling or setting longer-than-default checkpoint intervals are not recommended. Checkpoint data is saved under org.apache.spark.SparkContext.getCheckpointDir with prefix "connected-components". If the checkpoint directory is not set, this throws a java.io.IOException. Set a nonpositive value to disable checkpointing. This parameter is only used when the algorithm is set to "graphframes". Its default value might change in the future.

    See also

    org.apache.spark.SparkContext.setCheckpointDir in Spark API doc

  33. final def synchronized[T0](arg0: ⇒ T0): T0

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    AnyRef
  34. def toString(): String

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  35. final def wait(): Unit

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    @throws( ... )
  36. final def wait(arg0: Long, arg1: Int): Unit

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    @throws( ... )
  37. final def wait(arg0: Long): Unit

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    @throws( ... )
  38. def [B](y: B): (ConnectedComponents, B)

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    Implicit information
    This member is added by an implicit conversion from ConnectedComponents to ArrowAssoc[ConnectedComponents] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Inherited from Logging

Inherited from LazyLogging

Inherited from com.typesafe.scalalogging.Logging

Inherited from Arguments

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from ConnectedComponents to any2stringadd[ConnectedComponents]

Inherited by implicit conversion StringFormat from ConnectedComponents to StringFormat[ConnectedComponents]

Inherited by implicit conversion Ensuring from ConnectedComponents to Ensuring[ConnectedComponents]

Inherited by implicit conversion ArrowAssoc from ConnectedComponents to ArrowAssoc[ConnectedComponents]

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